After absorption vitamins undergo chemical transformations while minerals do not.

TRUE

Vitamins are organic compounds and they undergo chemical changes in the metabolism to form new compounds or elements.

On the other hand, minerals are elements, which cannot suffer chemical changes. To change minerals should change the atoms, which is not possible and would not be a chemical change.

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.